Fabric-strength-testing device.



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WILLIAM M. VERMILYE, OF NEW YORK, N. Y.

FABRIC-STRENGTHMTESTlNG DEVBCE.

SPECIFICATION forming part of Letters Patent No. 662,327, dated November 20, 1900.

Application led February l5, 1900. serial No. 5,322. (No model.)

rics; and the object is to provide a device ofA this character that shall be simple in its construction, having means for marking` or indieatin g the strength of the material tested, and also having means 'by which the textureV or structure of the fabric maybe examined while testing its strength.

I will describe a fabricstrength-testing device embodying my invention and then point out the novel featnresin the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the gures.

Figure l is a perspective view of a device embodying my invention. Fig. 2 is a bottom or back view. Fig. 3 is a section on the line :1; n of Fig. l, and Fig. 4 shows one of a number of dial-plates that may be employed.

The frame comprises parallel side members l, an end member 2 at right angles to the side members, and a curvedforsemicircular member 3 at the opposite end. At-the junction of the member 3 and the side members acrossbar 4 is formed, which is, in fact, a portion of from the block 5 through openings in the end portion 2 of the frame, and at the outer end these guide-bars are connected by a crosshead 11, and mounted to turn in this crosshead ll is a screw 12, which engages in a tapped hole in the portion 2 of the frame. The screw12 may have a milled head I3, and it may also have a handle 14, so that it may be easily turned while stretching the material. Another block l5 is also movable in the frame and has a recess, one wall 16 of which is corrugated to provide a jaw-section coacting with the corrugations or teeth on the other jaw section or block 17 in the recess in the block, and this block 17 is adjusted by means of a screw 16.` A plate or closure 19 is attached to the rear side ot' the block 15, and the rear side of the recess 6 is also closed by a cross-piece or bridge. These closures provide a stop against which the straight edge of a fabric may be placed when between the jaws to insure the placing of the threads lengthwise of the pulling strain.

From the block l5 guiderods 2021 extend through openings in the cross-bar 4, and one of these guide-rods, here shown as the rod 2l, is provided with a rack 22, engaging with a pinion 23, one end of the shaft of said pinion having a bearing in a plate 24, extended from the cross-bar 4, and the other end of said pinion-shaft extends through an opening in a dial-plate 25, secured to the frame of the machine,

Loosely mounted on the shaft or spindle of the pinion is an indicating-pointer 26, and rigidly connected to said shaft or spindle is a shifting arm 27, having a pin 28, adapted to engage with the pointer 26. The dial is marked with suitable scales, over which the pointer 26 is movable. Preferably the dial will` have a plurality of scales, as indicated at 29, 30, and 3l, the marks of the several scales being differently spaced, adapting the dial to different fabrics. A number of differently-scaled dials, as indicated in Fig. 4, may be provided for the machine. Sbuch supplemental dials are provided with openings 32, into which the spindle of the pinion may pass, and the supplemental dials will be held in place against the fixed dial 25 by means of hookelugs 33 on said fixed dial, and stop-pins 34 on the iixed dial will limit the inward movement of the auxiliary dials. A coiled spring 35 is attached at one end to the framesection 3 and at the other end to the block l5.

IOO

This spring serves as a counterbalance for the strain on the material.

AS a means for observing the texture and structure of the fabric while being stretched,

I employ a magnifying-glass arranged in a' tube 36, attached vto an arm 37, extended from the block l5. The upper member l of the frame is provided with a slot 38, into which the upper portion of the tube may pass, and wherein said tube may move as the block moves. Also attached to the block l5 is a plate 39, having a rectangular sight-opening in line with the magnifying-glass. The sight-opening may be of the usual size employed in devices for magnifying and counting the number of threads in a fabric-say one-fourth of an inch square. In order that the plate 39 may be swung upward to permit the blocks 5 and l5 to move close together, the said plate has a hinge connection 40 with the block l5.

In operation after clamping a strip of material to be tested in the clamping device and the outer edge is trimmed off, if desired close to the outer surface of the clamping device,

. the screw l2 is to be operated to draw the block 5 outward. The block l5 will also be drawn against the resistance of the spring 35. rlhe rack 22 in its movement with the block 15 will rotate the pinion 23, and consequently rotate the arm or finger 27, and the pin 2S on said arm 27 will engage with the pointer 26, moving it over the dial. When the fabric breaks, the block l5 will be immediately drawn back to its normal position by means of the spring returning the arm 27 to its normal position, but leaving the pointer 26, having frictional contact with the dial at its adjusted place on the dial, from which the strength of the material may be observed. As before stated, the texture of the material may be observed through the magnifyingglass during the whole operation of testing it for strength-that is, by its use the parting of the meshes can be observed.

It is obvious that this device may be made quite small and comparatively light, so that it can be conveniently carried in the pocket, if desired. If it is desired to attach the device to a lixed support or a bench, it may be provided with a screw-threaded lug 41 to engage in a threaded socket secured to the support or bench. l

To observe the stretching quality of the fabric being tested, I employ a gage, here shown in the form of a rule 42. This rule is shown as attached to the block 15 and its scale coacting with a pointer or indicator mark on the block 5.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- A l. A fabric-Streugth-testing device, comprising a frame, jaw-carrying devices movable in said frame, guides extended from one of said jaw-carrying devices and extending through an opening in a member of the frame, a screw for moving said jaw-carrying device, a spring connecting the other jaw-carrying device with the frame, a guide extended from said other jaw-carrying device and having a rack, a pinion engaging with said rack, a pointer loosely mounted on the shaft of the said pinion, an arm rigidly connected to said shaft and adapted to move the pointer, and a dial over which the pointer is movable, substantially as specified.

2. A fabric-strength-testing device, coinprising a frame, jaw-carrying devices movable in said frame, a screw for moving one of said jaw-carrying devices, an indicating-in- WILLIAM M. VERMILYE. Witnesses:

C. R. FERGUSON, F. W. HANAFORD. 

